“+ noun
( plural ptychopterygia )
Etymology: New Latin, from ptych- + Greek pterygion little wing, fin — more at pterygium
: a primitive fin consisting of a low triangular flap supported by a series of unbranched rays
“+ noun
( plural ptychopterygia )
Etymology: New Latin, from ptych- + Greek pterygion little wing, fin — more at pterygium
: a primitive fin consisting of a low triangular flap supported by a series of unbranched rays
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012